Results 81 to 90 of about 134,894 (128)

基于红外热波技术的电瓷材料孔洞缺陷检测研究

open access: yesDianci bileiqi
为了解决现有无损检测技术在检测电瓷材料孔洞缺陷中的局限性,提出采用红外热波技术对电瓷材料孔洞缺陷进行检测研究。基于热传导定律,推导了红外热波技术原理,根据热波的独立性和衰减性等数理特性,提出了采用非负矩阵分解和快速傅里叶变换的热波特征提取方法,并重构了相应的特征热图。对制备的含人工孔洞缺陷瓷套样品进行检测研究,得到了不同表面发射率瓷套的检测特点,得出了表面发射率对红外热波检测效果的影响规律。基于非负矩阵分解特征图、相位图和幅值图等重构特征热图,消除了不均加热影响,提升了红外热波技术的检测能力。研究表明 ...
岳永刚   +4 more
doaj  

[Clinical characteristics and outcomes of neonatal dengue fever in Foshan]. [PDF]

open access: yesZhongguo Dang Dai Er Ke Za Zhi
Luo FJ   +10 more
europepmc   +1 more source

[Association between periconception maternal cold and heat exposure and the risk of congenital heart disease in offspring in China]. [PDF]

open access: yesBeijing Da Xue Xue Bao Yi Xue Ban
Xu H   +10 more
europepmc   +1 more source

[Construction and validation of a multimodal risk prediction model for burn sepsis in infants and toddlers based on deep learning]. [PDF]

open access: yesZhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi
Shen YH, Zhang L, Ji Y, Chen S, Shen WM.
europepmc   +1 more source

[Role and mechanism of infrared thermography in early identification of necrosis risk in random-pattern flaps of mice]. [PDF]

open access: yesZhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi
Jiang XQ   +5 more
europepmc   +1 more source

[Clinical characterization and prognosis of connective tissue disease-associated hemophago-cytic syndrome in adults]. [PDF]

open access: yesBeijing Da Xue Xue Bao Yi Xue Ban
Yuan X   +6 more
europepmc   +1 more source

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